Granted Patent
Utility
US 5,098,967 · App. 07/258,052
Method of controlling the molecular weight of polypropylene
Inventors:
Tadashi Asanuma, Ichiro Fujio, Nobutaka Uchikawa
Patented Case
View Patent ↗
Granted: Mar 24, 1992
Filed: Oct 17, 1988
Inventors
Tadashi Asanuma
Ichiro Fujio
Nobutaka Uchikawa
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.